I received two Sheaffer 100's for Christmas. One from my mother and one from my girlfriend. Both silver. At first, I thought that I'd use them both, albeit with different colored inks, but then I realized I'd have to check by writing or at the least uncapping and looking at the nib creep before using, and this would be a total pain. Thus, I have not used the one with the medium nib, but am loving the one with the fine nib. Any chance anyone would want to trade for a similar value pen? TWSBI 580? This pen is honestly fantastic, I just would never be able to tell the difference and it would be a hassle.
Quick impressions. Holy moly does it write smooth! I only get feedback during long and fast strokes, other than that, it is pure silk. The pen is small. The same size as a cheap bic but just a tad thicker. This with the added weight makes it a tad uncomfortable to hold, but I'm sure I will adjust. No hard starts or anything, so reliable. Not only that, but the pen is gorgeous!